Filtration ; -Nylon membrane · Onepure 13 mm Syringe Filter Nylon membrane, 0.22 um 100 pcs/box, OP130200 ; -PTFE membrane · Onepure 13 mm Syringe Filter PTFE Syringe Filters, Membrane Filters, Vials, Septa and Caps. Syringe Filters, Nylon, PTFE, PVDF, PES, MCE, 2ml Vials, 4ml Vials, 20ml Vials. 13mm 0.22um Mixed cellulose (CA-CN) Syringe filters